Electron tube heat shield

Abstract

The utility model provides an electronic tube heat shield, and relates to the technical field of power amplifiers. The device comprises a cover body, a containing cavity used for containing the electron tube is formed in the cover body, a covering opening suitable for the electron tube to penetrate through is formed in the bottom of the cover body, the electron tube is arranged on an installation platform, and the cover body can be arranged on the electron tube in a sleeving mode and is connected with the installation platform; the mounting platform is further provided with an electronic device matched with the electronic tube, the cover body is provided with a heat release port, and the heat release port faces the direction away from the electronic device. The electronic tube has the advantages that the electronic devices arranged around the electronic tube can be protected, and it is guaranteed that the electronic devices are prevented from being damaged due to high-temperature overload or reduction of use performance or shortening of service life due to excessive heat absorption and too high temperature.

Description

Technical Field

[0001] The present application relates to the technical field of power amplifiers, and in particular to a heat insulation cover for an electron tube. Background Art

[0002] A tube amplifier, or an audio power amplifier, generally includes a tube and a transformer. Due to the size and component layout limitations of the amplifier, existing tube amplifiers generally place the tube and transformer together with other electronic components on the top of the amplifier body, and then cover the tube and transformer with a protective cover.

[0003] However, since the electron tube radiates a lot of heat when working, other electronic devices such as transformers adjacent to the electron tube will be heated and continue to heat up. This situation will not only reduce the performance of these electronic devices, but also shorten the service life of these electronic devices.

[0004] In view of this, it is necessary to provide an electron tube heat insulation cover. Utility Model Content

[0005] In order to solve the problem that electron tubes heat electronic devices when working, which may easily cause damage to the electronic devices, the present application provides an electron tube heat insulation cover.

[0006] The present application provides an electron tube heat insulation cover, which adopts the following technical solution: comprising a cover body, wherein a receiving cavity for receiving the electron tube is formed inside the cover body, and a cover opening suitable for the electron tube to pass through is formed at the bottom of the cover body, the electron tube is arranged on a mounting platform, and the cover body can be sleeved on the electron tube and connected to the mounting platform;

[0007] The installation platform is also provided with an electronic device matching the electron tube, and the cover body is provided with a heat release port, which faces a direction away from the electronic device.

[0008] By adopting the above technical solution, the electron tube heat insulation cover can block the heat radiated by the electron tube to the outside, and discharge the heat in a direction away from the electronic device, so as to ensure that the electronic device will not suffer from performance degradation, shortened service life or high-temperature overload damage due to excessive heat absorption and high temperature, thereby protecting the electronic device.

[0009] Specifically, the cover body is a tubular structure, a tube opening at one end of the tubular structure is formed as the cover opening, and an end surface at the other end of the tubular structure is tilted downward in a direction from close to the electronic device to away from the electronic device to form the heat release port, and external air can enter the accommodating cavity from a portion of the heat release port close to the mounting platform, and leave the accommodating cavity from a portion of the heat release port away from the mounting platform after being heated by the electron tube.

[0010] By adopting the above technical solution, the design of the electron tube heat insulation cover enables the cold air from the outside to enter the accommodating cavity from the portion of the heat release port closer to the installation platform, and the air in the accommodating cavity will leave the accommodating cavity from the portion of the heat release port farther from the installation platform after being heated by the electron tube, thereby realizing air convection heat exchange, and the inner wall of the cover body with a tubular structure will guide the flow direction of the hot air to enhance the convection effect of the air and take away more heat in the electron heat insulation cover, thereby reducing the temperature of the surface of the electron tube heat insulation cover, enhancing the heat insulation effect of the electron tube heat insulation cover, and ensuring that the electronic devices around the electron tube heat insulation cover will not absorb too much heat; it can also reduce the temperature of the electron tube to avoid overheating of the electron tube.

[0011] Furthermore, the light emitted from the electron tube toward the inner wall of the accommodating cavity can be reflected by the inner wall of the accommodating cavity and emitted from the heat release port.

[0012] By adopting the above technical solution, the light and heat radiated by the electron tube to the outside will be reflected by the inner wall of the electron tube heat insulation cover and emitted from the radiation port in a direction away from the electronic device, so that the electron tube heat insulation cover is not easily heated by the radiation of the electron tube, thereby enhancing the heat insulation effect of the electron tube heat insulation cover.

[0013] Specifically, the mounting platform is provided with a plug-in slot matching the cover opening, and the cover body can be inserted into the plug-in slot.

[0014] By adopting the above technical solution, the plug-in slot can limit the cover body in the horizontal direction, so that the electron tube heat insulation cover is not easy to shake in the horizontal direction; the design of the plug-in slot also allows the user to quickly install the electron tube heat insulation cover by directly inserting the electron tube heat insulation cover into the plug-in slot from top to bottom.

[0015] Specifically, a pair of elastic members are arranged opposite to each other on the mounting platform, and the pair of elastic members are arranged around the electron tube. The cover opening can be sleeved on the pair of elastic members, and the inner wall of the accommodating cavity can abut against the pair of elastic members and make each of the elastic members deform in a direction close to the electron tube.

[0016] By adopting the above technical solution, when the electron tube heat insulation cover is placed on a pair of elastic members, the pair of elastic members will deform in a direction close to the electron tube and press against the inner wall of the electron tube heat insulation cover, so that the electron tube heat insulation cover can be fixed by the elastic force applied to the electron tube heat insulation cover by the pair of elastic members and the friction force between the pair of elastic members and the inner wall of the electron tube heat insulation cover, thereby making it difficult for the electron tube heat insulation cover to fall off from the mounting platform.

[0017] Furthermore, an auxiliary air inlet is provided on the outer wall of the cover body near the cover opening.

[0018] By adopting the above technical solution, the cold air from the outside can first enter the bottom of the electron tube heat insulation cover from the auxiliary air inlet, and then leave the accommodating cavity from the part of the heat release port far away from the installation platform after absorbing heat and heating up to hot air, so as to ensure that the air in each part of the accommodating cavity can participate in convection, thereby enhancing the cooling effect.

[0019] Furthermore, it also includes a dust cover, which can be arranged on the cover body and shield the heat release port and the auxiliary air inlet.

[0020] By adopting the above technical solution, when the electron tube stops working, the dust shield can block the dust falling in the air; when the electron tube starts working, the air carrying dust will enter the accommodating cavity from the heat release port and the auxiliary air inlet, and the dust shield can also filter the dust carried in the air, so that too much dust will not accumulate on the electron tube, thereby avoiding the situation that too much dust falls on the surface of the electron tube, causing heat to accumulate inside the electron tube and cannot be dissipated, resulting in overheating or even burning of the electron tube.

[0021] Furthermore, the dust shield comprises a transparent cover and a dust screen enclosure, the top of the dust screen enclosure is connected to the transparent cover, and the dust screen enclosure can be covered on the cover body and abut against the mounting platform.

[0022] By adopting the above technical solution, the dust-blocking net enclosure can be wrapped around the electron tube heat shield to filter the dust carried by the air entering the accommodating cavity; the transparent cover can not only block the dust falling in the air, but also allow the light radiated by the electron tube to pass through the transparent cover and be emitted from the accommodating cavity, thereby being able to block the falling dust while taking into account the heat insulation effect of the electron tube heat shield.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] The invention comprises a cover body, wherein a receiving cavity for receiving an electron tube is formed inside the cover body, and a cover opening suitable for the electron tube to pass through is formed at the bottom of the cover body, the electron tube is arranged on a mounting platform, and the cover body can be sleeved on the electron tube and connected to the mounting platform; an electronic device matching the electron tube is also arranged on the mounting platform, and a heat release opening is provided on the cover body, and the heat release opening faces a direction away from the electronic device, so that the heat radiated from the electron tube to the outside can be blocked by the electron tube heat insulation cover, and the heat is discharged in a direction away from the electronic device, so as to ensure that the electronic device will not suffer from reduced performance, shortened service life, or high-temperature overload damage due to excessive heat absorption and excessive temperature, thereby protecting the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional diagram of a heat shield for an electron tube of the present application;

[0026] Figure 2 is along Figure 1 A schematic cross-sectional view of an electron tube without a dust cover taken along the central axis;

[0027] Figure 3 is along Figure 2 A schematic cross-sectional view taken along the AA direction, in which only the electron tube with a dust cover is shown.

[0028] Figure numerals: 1. cover body; 11. cover opening; 12. heat release opening; 13. auxiliary air inlet; 2. electron tube; 3. installation platform; 31. plug-in slot; 32. elastic part; 4. electronic device; 5. dust cover; 51. transparent cover; 52. dust screen enclosure. DETAILED DESCRIPTION

[0029] Figure 1 is a three-dimensional diagram of a heat shield for an electron tube of the present application, Figure 2 is along Figure 1 A schematic cross-sectional view of an electron tube without a dust cover taken along the central axis. Figure 1 and Figure 2 The present application provides an electron tube heat insulation cover, comprising: a cover body 1, a housing cavity for accommodating an electron tube 2 is formed inside the cover body 1, and a cover opening 11 suitable for the electron tube 2 to pass through is formed at the bottom of the cover body 1, and the electron tube 2 is inserted into the electron tube mounting hole on the mounting platform 3. Taking the application of the electron tube heat insulation cover to an electron tube audio power amplifier as an example, the mounting platform 3 is formed on the top of the electron tube audio power amplifier, and an electronic device 4 matching the electron tube 2, such as a transformer, a signal amplifier and a voltage stabilizer, is also provided on the mounting platform 3; the cover body 1 can be sleeved on the electron tube 2 and connected to the mounting platform 3, and a heat release port 12 is opened on the cover body 1, and the heat release port 12 faces the direction away from the electronic device 4.

[0030] Through the above design, the electron tube heat insulation cover can block the heat radiated by the electron tube 2 to the outside, and discharge the heat in the direction away from the electronic device 4, so as to ensure that the electronic device 4 will not suffer from performance degradation, shortened service life or high-temperature overload damage due to excessive heat absorption and high temperature, thereby protecting the electronic device 4.

[0031] See also Figure 1 and Figure 2 The cover body 1 is a tubular structure, and a pipe opening at one end of the tubular structure is formed as a cover opening 11. The end surface of the other end of the tubular structure is inclined downward in a direction from close to the electronic device 4 to far away from the electronic device 4 to form a heat release opening 12, so that the cold air from the outside can enter the accommodating cavity from the portion of the heat release opening 12 closer to the installation platform 3, and the air in the accommodating cavity will leave the accommodating cavity from the portion of the heat release opening 12 farther from the installation platform 3 after being heated by the electron tube 2, thereby realizing convection heat exchange of the air; the inner wall of the cover body 1 of the tubular structure can also guide the flow direction of the hot air to enhance the convection effect of the air and take away more heat in the electronic heat insulation cover, thereby reducing the temperature of the surface of the electron tube heat insulation cover, enhancing the heat insulation effect of the electron tube heat insulation cover, and ensuring that the electronic device 4 around the electron tube heat insulation cover will not absorb too much heat; the above design can also reduce the temperature of the electron tube 2 to avoid overheating of the electron tube 2.

[0032] Specifically, the electron tube heat shield can be made of a stainless steel thin-walled tube with a wall thickness of 0.5 to 1 mm, so that the production cost of a single electron tube heat shield is low; the inner wall of the cover body 1 can also be polished to achieve a mirror effect, so that the light and heat radiated to the outside by the electron tube 2 will be reflected by the inner wall of the electron tube heat shield and emitted from the radiation port in a direction away from the electronic device 4, so that the electron tube heat shield is not easily heated by the radiation of the electron tube 2, thereby enhancing the heat insulation effect of the electron tube heat shield.

[0033] See also Figure 1 and Figure 2 When installing the electron tube heat shield, a plug-in slot 31 matching the shield opening 11 can be pre-opened on the installation platform 3, so that the user only needs to directly insert the electron tube heat shield into the plug-in slot 31 from top to bottom, and the shield body 1 can be limited in the horizontal direction through the plug-in slot 31, so that the electron tube heat shield is not easy to shake in the horizontal direction, thereby realizing the rapid installation of the electron tube heat shield.

[0034] Optionally, when the mounting platform 3 is not pre-processed with the plug-in groove 31, a pair of elastic members 32 can be fixed with heat-resistant glue at the portion of the mounting platform 3 close to the electron tube mounting hole. The pair of elastic members 32 are arranged at equal intervals around the electron tube 2. The pair of elastic members 32 can be a pair of retaining springs processed with 1mm copper wire. Both ends of each retaining spring are bonded to the mounting platform 3, and the middle part of each retaining spring is bent in the direction away from the electron tube mounting hole.

[0035] By adopting the above design, when the electron tube heat insulation cover is placed on a pair of clips, the middle part of each clip will press against the inner wall of the electron tube heat insulation cover and deform in the direction close to the electron tube 2, so that the electron tube heat insulation cover can be fixed by the elastic force applied to the electron tube heat insulation cover by the pair of clips and the friction between the pair of clips and the inner wall of the electron tube heat insulation cover, so that the electron tube heat insulation cover is not easy to fall off from the mounting platform 3.

[0036] Figure 3 is along Figure 2 A schematic cross-sectional view taken along the AA direction in FIG. 1 shows only the electron tube with the dust cover. Figure 1 and Figure 3 In another embodiment provided in the present application, an auxiliary air inlet 13 can be opened on the outer wall of the cover body 1 near the cover opening 11, so that the cold air from the outside can first enter the bottom of the electron tube heat insulation cover from the auxiliary air inlet 13, and then leave the accommodating cavity from the part of the heat release port 12 far away from the installation platform 3 after absorbing heat and heating up to hot air, so as to ensure that the air in each part of the accommodating cavity can participate in convection, thereby enhancing the cooling effect.

[0037] See also Figure 1 and Figure 3 In another embodiment provided in the present application, an electron tube heat insulation cover also includes a dust cover 5, which includes a transparent cover 51 and a dust screen enclosure 52. The transparent cover 51 can be a glass cover so that the light radiated by the electron tube 2 can pass through the transparent cover 51 to be emitted from the accommodating cavity; the top of the dust screen enclosure 52 is connected to the transparent cover 51, and the dust screen enclosure 52 can be covered on the cover body 1 and abut against the mounting platform 3.

[0038] By adopting the above design, when the electron tube 2 stops working, the transparent cover 51 and the dust-blocking net enclosure 52 can block the dust falling in the air; when the electron tube 2 starts working, the air carrying dust will enter the accommodating cavity from the heat release port 12 and the auxiliary air inlet 13, and the dust-blocking net enclosure 52 can filter the dust carried in the air, so that too much dust will not accumulate on the electron tube 2, thereby avoiding the situation where too much dust falls on the surface of the electron tube 2, causing heat to accumulate inside the electron tube 2 and unable to dissipate, resulting in overheating or even burning of the electron tube 2.

[0039] Specifically, the filter screen on the dust screen enclosure 52 for filtering dust can be made of heat-resistant metal, such as an 80-mesh stainless steel filter screen, so as to ensure that the filter screen will not be melted or ignited by the high temperature of the electron tube 2.

[0040] The working principle of the electron tube heat insulation cover of the present application when in use is as follows:

[0041] The invention comprises a cover body 1, wherein a receiving cavity for receiving an electron tube 2 is formed inside the cover body 1, and a cover opening 11 suitable for the electron tube 2 to pass through is formed at the bottom of the cover body 1, the electron tube 2 is arranged on a mounting platform 3, and the cover body 1 can be sleeved on the electron tube 2 and connected to the mounting platform 3; an electronic device 4 matching the electron tube 2 is also arranged on the mounting platform 3, and a heat release opening 12 is opened on the cover body 1, and the heat release opening 12 faces the direction away from the electronic device 4, so that the heat radiated from the electron tube 2 to the outside can be blocked through the electron tube heat insulation cover, and the heat is discharged in the direction away from the electronic device 4, so as to ensure that the electronic device 4 will not have the situation of reduced performance, shortened service life or high temperature overload damage due to excessive heat absorption and high temperature, thereby realizing the protection of the electronic device 4.

[0042] It should be noted that the above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electron tube heat insulation cover, used to cover the electron tube, Features: The invention comprises a cover body (1), wherein a receiving cavity for receiving the electron tube (2) is formed inside the cover body (1), and a cover opening (11) suitable for the electron tube (2) to pass through is formed at the bottom of the cover body (1), the electron tube (2) is arranged on a mounting platform (3), and the cover body (1) can be sleeved on the electron tube (2) and connected to the mounting platform (3); The mounting platform (3) is also provided with an electronic device (4) matching the electron tube (2), and the cover body (1) is provided with a heat release port (12), the heat release port (12) facing away from the electronic device (4).

2. The electron tube heat shield according to claim 1, Features: The cover body (1) is a tubular structure, a tube opening at one end of the tubular structure forms the cover opening (11), and an end surface at the other end of the tubular structure is inclined downward in a direction from close to the electronic device (4) to away from the electronic device (4) to form the heat release opening (12), and external air can enter the accommodating cavity from a portion of the heat release opening (12) close to the mounting platform (3), and after being heated by the electron tube (2), leave the accommodating cavity from a portion of the heat release opening (12) away from the mounting platform (3).

3. The electron tube heat shield according to claim 2, Features: Light emitted from the electron tube (2) toward the inner wall of the accommodating cavity can be reflected by the inner wall of the accommodating cavity and emitted from the heat release port (12).

4. The electron tube heat shield according to claim 1, Features: The installation platform (3) is provided with an inserting slot (31) matching the cover opening (11), and the cover body (1) can be inserted into the inserting slot (31).

5. The electron tube heat shield according to claim 1, Features: A pair of elastic members (32) are arranged opposite to each other on the mounting platform (3); the pair of elastic members (32) are arranged around the electron tube (2); the cover opening (11) can be sleeved on the pair of elastic members (32); the inner wall of the accommodating cavity can abut against the pair of elastic members (32) and cause each of the elastic members (32) to deform in a direction close to the electron tube (2).

6. The electron tube heat shield according to claim 2, Features: An auxiliary air inlet (13) is provided on the outer wall of the cover body (1) at a portion close to the cover opening (11).

7. The electron tube heat shield according to claim 6, Features: It also comprises a dust shield (5), which can be arranged on the cover body (1) and shield the heat release port (12) and the auxiliary air inlet (13).

8. The electron tube heat shield according to claim 7, Features: The dust shield (5) comprises a transparent cover (51) and a dust screen enclosure (52); the top of the dust screen enclosure (52) is connected to the transparent cover (51), and the dust screen enclosure (52) can be covered on the cover body (1) and abut against the mounting platform (3).

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